JDK-8205698 : [lworld] unsafe array support for value types for VarHandles
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: runtime
  • Affected Version: repo-valhalla
  • Priority: P4
  • Status: Closed
  • Resolution: Duplicate
  • OS: generic
  • CPU: generic
  • Submitted: 2018-06-26
  • Updated: 2018-07-13
  • Resolved: 2018-07-13
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Other
repo-valhallaResolved
Related Reports
Duplicate :  
JDK-8207197 - [lworld] VarHandle array support for value types
Relates :  
JDK-8207197 - [lworld] VarHandle array support for value types
Relates :  
JDK-8206144 - [lworld] Adapt and add C2 intrinsics for value types Unsafe API
Description
VarHandles rely on unsafe APIs. 
Frederic is adding support for unsafe support for value type fields.
Arrays appear to depend on:
unsafe.arrayBaseOffset, arrayIndexScale and then
variations of PutObject/GetObject operating on arrayKlasses.
Comments
Approach has been modified to assume user knows what they are doing and checks for both value types and flattened value types.
13-07-2018